COTHAM 21

Oil · District 08 · Lease #43780

Operator: ELEMENT PETRO OPERATING II, LLC

Cum Oil

30k BBL

Cum Gas

10k MCF

casinghead

Wells

1

Production

2013-02 — 2026-04

Peak Month

2013-05

Production History

Cum Oil: 30,257 BBL Cum Gas: 9,988 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

330 BBL/mo

Di (annual)

13.7%

b-factor

0.0

EUR

28,788 BBL

R-squared

0.469

type

exponential

Operator History (from monthly production reports)

2013-10 — 2026-07 DIAMONDBACK E&P LLC 154 mo
2013-02 — 2013-09 ELEMENT PETRO OPERATING II, LLC 8 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1DIAMONDBACK E&P LLC112,0002012-11-19